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Gravitational wave background and non-Gaussianity as a probe of the curvaton scenario

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Published 5 January 2010 Published under licence by IOP Publishing Ltd
, , Citation Kazunori Nakayama and Jun'ichi Yokoyama JCAP01(2010)010 DOI 10.1088/1475-7516/2010/01/010

1475-7516/2010/01/010

Abstract

We study observational implications of the stochastic gravitational wave background and a non-Gaussian feature of scalar perturbations on the curvaton mechanism of the generation of density/curvature fluctuations, and show that they can determine the properties of the curvaton in a complementary manner to each other. Therefore even if Planck could not detect any non-Gaussianity, future space-based laser interferometers such as DECIGO or BBO could practically exhaust its parameter space.

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10.1088/1475-7516/2010/01/010